Comment 1 for bug 530091

There are some changes in the nodes registration process. It should now work automatically and not require "discover-nodes". You can look into the CC's /var/log/eucalyptus/registration.log if it detected the NC and (if yes) what the euca_conf --register-nodes command returned.

From your last attempts, it looks like the key from the CC was not distributed to the /var/lib/eucalyptus/.ssh/authorized_keys on the NC during the install process. Could you check the contents of that file on the NC ?

Was the rest of the NC install preseeded ? Or did you have to manually enter username/password and other install details ? I suspect you started the NC install too early and no preseed was yet available from the CC.